Random network concept, water

A series of polyamine-graft copolymers (See Sect. 4.3) were found to form microdomain structure and to exhibit unique biomedical behavior at the interface with living cells, e.g. blood platelets or lymphocytes. Although a number of postulates were proposed to explain the unique behavior of microdomain-structured surface, mechanisms for the mode of interaction of living cells with any of the domain-structured materials have not been adequately explained. In Sect. 4, the author will review results on the biomedical behavior of SPUs, HEMA-STY, and polyamine-graft copolymers, and discuss their interfacial properties in terms of the random network concept of water molecules on the material s surface. 

The mobility concept for surrounding water molecules is closely related to the random-network concept, as will be discussed in Sect. 4.4. 

The Random Network Concept of Water Molecules on Materials Surface... 

Hydrogen bonding, tetrahedral coordination, random networks and related concepts are not direct features of this answer. Nevertheless, they are relevant to understanding liquid water they are elements in the bag of tricks that is used to achieve the engineering consequences that are discussed in the picture above (Pratt and Pohorille, 2002 Ashbaugh et al, 2003). 

This notion is supported by a large number of independent experimental data, related to structure and mobility in these membranes. It implies furthermore a distinction of proton mobility in various water environments, strongly bound surface water and liquidlike bulk water, and the existence of water-filled pores as network forming elements. Appropriate theoretical treatment of such systems involves random network models of proton conductivity and concepts from percolation theory, and includes hydraulic permeation as a prevailing mechanism of water transport under operation conditions. On the basis of these concepts a consistent approach to membrane performance can be presented. 

ABSTRACT The paper proposes an alternative approach to the failure risk analysis of water supply network which includes random emergency events inaccuracy, diversity and a small amount of data. The presented method is based on the so-called theory of facts (Shafer) based on the concept of inaccurate probabilities and possibilities (Zadech), which combines the so-called distribution capabilities of the belonging function of fuzzy set. The main aim of this paper is to present the concept of failure risk analysis of water supply network. The proposed model was used for failure risk analysis of water supply system serving 63 thousand people in the east of Poland. 

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